/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 晓星航
 * Date: 2023-11-21
 * Time: 14:51
 */
class Node {
    public int val;
    public Node left;
    public Node right;
}
public class Test {
    public static Node add() {
        Node a = new Node();
        Node b = new Node();
        Node c = new Node();
        Node d = new Node();
        Node e = new Node();
        Node f = new Node();
        Node g = new Node();
        a.val = 1;
        b.val = 2;
        c.val = 3;
        d.val = 4;
        e.val = 5;
        f.val = 6;
        g.val = 7;

        a.left = b;
        a.right = c;
        b.left = d;
        b.right = e;
        c.left = f;
        c.right = g;
        return a;
    }
    public static void main(String[] args) {
        Node root = new Node();
        System.out.println();
    }
}
